CN105295557A - Starch-based paint and preparation method thereof - Google Patents

Abstract

The invention relates to a starch-based paint, the preparation raw materials of which include the following components in parts by weight: 10-50 parts of starch, 30-75 parts of water, 0.1-5 parts of white pigment, 0.1-3 parts of film-forming aids, 0.01-2 parts of antifungal agent and 0.1-10 parts of plasticizer. The invention also provides a preparation method of the starch-based paint. The starch-based paint of the present invention has a long continuous adhesion time in a rain-free environment, is easy to clean, has a simple preparation process, and is convenient for industrial production needs.

Description

A kind of starch-based paint and preparation method thereof

technical field

The invention relates to the field of coatings, in particular to a starch-based coating and a preparation method thereof.

Background technique

Football, hockey and other sports lawns mainly include natural grass and artificial grass. Natural grass is expensive and has high maintenance costs. Currently, it is only used for high-end sports venues and events. Artificial grass is economical, all-weather, maintenance-free, and durable. It is widely used due to its many advantages. According to the requirements of competition rules, sports lawns generally require white functional lines for site design. Lime powder is generally used to delineate functional lines on natural lawns, which is easy to construct, but the functional lines are not prominent enough, and lime powder is easy to fly around the functional lines, polluting the environment After inhalation, it will also affect the health of athletes; artificial turf generally uses white turf as the functional line, which requires more complicated processes such as cutting and bonding the turf, which not only increases the construction cost, but also leaves hidden dangers, such as Glue opening due to poor maintenance. In addition, once the white functional lines are bonded and constructed, the site specifications will be completely limited, making it difficult to change the site specifications and meet the rich diversity of sports forms, which also causes a waste of resources.

In recent years, the coating industry has developed rapidly, and the application of coatings in the field of sports lawn functional lines has gradually been valued by lawn manufacturers and customers. However, the application of traditional resin coatings has been limited due to defects such as low adhesion to artificial turf PE, high hardness, and non-environmental protection.

Contents of the invention

The object of the present invention is to provide a starch-based coating that is non-toxic, environmentally friendly, degradable, and has a long adhesion time in an anhydrous environment. The invention also provides a preparation process for the coating.

In order to solve the above problems, the technical scheme adopted in the present invention is as follows:

A starch-based paint, the raw materials for its preparation include the following components in parts by weight: 10-50 parts of starch, 30-75 parts of water, 0.1-5 parts of white pigment, 0.1-3 parts of film-forming aids, antifungal agent 0.01-2 parts and 0.1-10 parts of plasticizer.

In the present invention, the white pigment can be an organic white pigment or an inorganic white pigment. The preferred solution is that the white pigment is one or more of titanium dioxide, nano-calcium carbonate, lithopone, and zinc oxide. combination.

In the present invention, the preferred solution is that the film-forming aids are polyethylene glycol, polyvinyl alcohol, polyvinylpyrrolidone and polyacrylamide, modified cellulose, alcohol ether film-forming aids, alcohol ester film-forming at least one of the additives.

In the present invention, the preferred scheme is that the polyethylene glycol has a weight average molecular weight of 200-8000.

In the present invention, the preferred scheme is that the antifungal agent is 1,2-phenylpropazothiazolin-3-one, benzoimidazole methyl carbamate, 2,4,5,6-tetrachloroisophthalonitrile , 2-n-octyl-4-isothiazolin-3-one and 2-(4-thiazolyl)benzimidazole or a combination of two or more.

In the present invention, the preferred solution is that the starch is a water-soluble modified starch; more preferably, the water-soluble modified starch is an oxidized starch.

In the present invention, the preferred solution is that the plasticizer is at least one of glycerin, sorbitol, surfactant and citric acid. The function of the plasticizer in the paint is to increase the flexibility of the coating film, preferably, the plasticizer is glycerin. Glycerin is miscible with water. Glycerin can adjust the viscosity of the system and improve the solubility of starch. Not only that, but the hardness of the starch coating film can also be changed through the change of glycerin content, so that the coating film and grass silk have a better mechanical contact structure , improve durability.

In the present invention, the preferred scheme is that its preparation raw materials include the following components in parts by weight: 18 parts of water-soluble modified starch, 75 parts of water, 2 parts of zinc oxide, 1 part of polyvinylpyrrolidone, 2-n-octyl- 0.5 parts of 4-isothiazolin-3-one, 0.5 parts of 2-(4-thiazolyl) benzimidazole and 3 parts of sorbitol.

The present invention also provides a preparation method of the starch-based paint, which includes the following steps: weighing each component according to the formula, mixing, and uniformly dispersing in an emulsifying device to obtain the finished product.

Among the present invention, preferred scheme is to carry out surface treatment to white pigment in advance, and surface treatment specifically comprises the following steps: get porous starch, be dissolved in water, obtain starch aqueous solution, the weight ratio of described white pigment, porous starch and water is (1 -10):(1-10):(80-98); then add the white pigment into the starch aqueous solution while stirring, the stirring speed is 50-1200r/min, continue to stir for 30min, then ultrasonically disperse for 2h, and let stand overnight; Then centrifuge and dry, the centrifugal speed is 1200-2000r/min, the centrifugation time is 3-8min, and the white pigment after surface treatment is obtained.

Compared with the prior art, the present invention has the following advantages: ordinary starch is usually not water-soluble, even if gelatinized by high-temperature cooking, it is only partially soluble, and the modified starch itself is not a good coating, and does not have a coating film All the necessary properties; through the formula design and process of the present invention, the starch-based coating made is environmentally friendly, non-toxic, biodegradable, and has minimal environmental load; the coating film duration of the starch-based coating is controllable , under normal natural conditions (no rain), the duration can reach more than 30 days, and it is easy to be washed by water without leaving traces, so that the specifications of the sports lawn site can be designed repeatedly; and the cost of starch is low, which is convenient for popularization and application; in addition, the preparation process Simple and convenient for industrial production.

The present invention will be described in detail below in combination with specific embodiments.

detailed description

A starch-based paint, the raw materials for its preparation include the following components in parts by weight: 10-50 parts of starch, 30-75 parts of water, 0.1-5 parts of white pigment, 0.1-3 parts of film-forming aids, antifungal agent 0.01-2 parts and 0.1-10 parts of plasticizer.

In the present invention, the preferred solution is that the white pigment is one or a combination of two or more of titanium dioxide, nano calcium carbonate, lithopone, zinc oxide and organic white pigments.

In the present invention, the preferred solution is that the film-forming aids are polyethylene glycol, polyvinyl alcohol, polyvinylpyrrolidone and polyacrylamide, modified cellulose, alcohol ether film-forming aids, alcohol ester film-forming at least one of the additives. Wherein the modified cellulose includes but not limited to water-soluble modified cellulose, such as hydroxypropyl methylcellulose and sodium carboxymethylcellulose.

In the present invention, the preferred scheme is that the polyethylene glycol has a weight average molecular weight of 200-8000.

In the present invention, the preferred scheme is that the antifungal agent is 1,2-phenylpropazothiazolin-3-one, benzoimidazole methyl carbamate, 2,4,5,6-tetrachloroisophthalonitrile , 2-n-octyl-4-isothiazolin-3-one and 2-(4-thiazolyl)benzimidazole or a combination of two or more.

In the present invention, the preferred solution is that the starch is a water-soluble modified starch; more preferably, the water-soluble modified starch is an oxidized starch.

In the present invention, the preferred solution is that the plasticizer is at least one of glycerin, sorbitol, surfactant and citric acid.

In the present invention, the preferred scheme is that its preparation raw materials include the following components in parts by weight: 18 parts of water-soluble modified starch, 75 parts of water, 2 parts of zinc oxide, 1 part of polyvinylpyrrolidone, 2-n-octyl- 0.5 parts of 4-isothiazolin-3-one, 0.5 parts of 2-(4-thiazolyl) benzimidazole and 3 parts of sorbitol.

The present invention also provides a preparation method of the starch-based paint, which includes the following steps: weighing each component according to the formula, mixing, and uniformly dispersing in an emulsifying device to obtain the finished product.

Among the present invention, preferred scheme is to carry out surface treatment to white pigment in advance, and surface treatment specifically comprises the following steps: get porous starch, be dissolved in water, obtain starch aqueous solution, the weight ratio of described white pigment, porous starch and water is (1 -10):(1-10):(80-98); then add the white pigment into the starch aqueous solution while stirring, the stirring speed is 50-1200r/min, continue to stir for 30min, then ultrasonically disperse for 2h, and let stand overnight; Then centrifuge and dry, the centrifugal speed is 1200-2000r/min, the centrifugation time is 3-8min, and the white pigment after surface treatment is obtained.

In the embodiment of the present invention:

The modified cellulose adopted in each embodiment is hydroxypropyl methylcellulose, and the starch adopted is oxidized starch;

The white pigments used in each embodiment have been subjected to surface treatment in advance, and the surface treatment specifically includes the following steps: take porous starch and dissolve it in water to obtain an aqueous starch solution. The weight ratio of the white pigment, porous starch and water is 10:10:80 Then add the white pigment into the starch aqueous solution while stirring, the stirring speed is 500r/min, continue to stir for 30min, then ultrasonically disperse for 2h, let it stand overnight; then centrifuge and dry, the centrifugal speed is 1500r/min, and the centrifugation time is 5min, Obtain the white pigment after surface treatment;

The starch-based coatings of each embodiment are prepared through the following steps: weigh each component according to the formula, then mix them, and disperse them uniformly in an emulsifying device. The porous starch is preferably from Liaoning Lida Biotechnology Co., Ltd., which has a porous shape of hornet's honeycomb and has strong adsorption capacity.

Example 1

A kind of starch-based paint, its preparation raw material comprises the following components by weight: 18 parts of water-soluble modified starch, 75 parts of water, 2 parts of zinc oxide, 1 part of polyvinylpyrrolidone, 2-n-octyl-4- 0.5 parts of isothiazolin-3-one, 0.5 parts of 2-(4-thiazolyl) benzimidazole and 3 parts of sorbitol.

Example 2

A kind of starch-based coating, its preparation raw material comprises the following components by weight: 30 parts of water-soluble starch, 60 parts of water, 3 parts of titanium dioxide, 1 part of water-soluble modified cellulose, 1,2-phenylpropaniso 1 part of thiazolin-3-one, 5 parts of glycerin.

Example 3

A kind of starch-based coating, its preparation raw material comprises the following components by weight: 25 parts of water-soluble starch, 65 parts of water, 2 parts of lithopone, 1 part of water-soluble modified cellulose, 1,2-phenylpropane 1 part of isothiazolin-3-one, 6 parts of glycerin.

Example 4

A kind of starch-based paint, its preparation raw material comprises the following components by weight: 22 parts of water-soluble starch, 69 parts of water, 3 parts of calcium carbonate, 1.5 parts of propylene glycol ether compounds, 2-(4-thiazolyl) benzene 1.5 parts of imidazole and 3 parts of citric acid.

Example 5

A kind of starch-based paint, its preparation raw material comprises the following components by weight: 10 parts of starch, 70 parts of water, 5 parts of white pigment, 3 parts of polyvinylpyrrolidone, 2 parts of benzoimidazole methyl carbamate and stearin Sodium acid 0.1 part.

Example 6

A kind of starch-based coating, its preparation raw material comprises the following components by weight: 50 parts of starch, 30 parts of water, 0.1 part of white pigment, 0.1 part of polyethylene glycol (weight average molecular weight is 4000), 2,4, 0.01 parts of 5,6-tetrachloroisophthalonitrile and 10 parts of sodium dodecylbenzenesulfonate.

Experimental example

Get the starch-based coating of Example 1-6, then get 60 pieces of artificial turf with a size of 10cm×20cm, every 10 pieces of turf are a group, each group is coated with the starch-based coating of Example 1-6, and air-dried; then Each group took 5 pieces of turf for paint stability test, and each group took 5 pieces of turf for easy cleaning test;

1. Coating stability experiment

Put each group of turf coated with starch-based paint in a plastic shed to simulate a rainless environment, observe the duration of starch-based paint on the artificial turf, and calculate the average value. The specific results are shown in Table 1 below:

Table 1: Data sheet of coating stability experiment

test group Example 1 Example 2 Example 3 duration 35.2 days 32.4 days 31.6 days test group Example 4 Example 5 Example 6 duration 32.1 days 33.5 days 30.9 days

1. Coating ease of cleaning test

Put each group of turf coated with starch-based paint under the faucet, the water flow rate is 0.2L/min, observe and record the washing time of the starch-based paint on the artificial turf, and calculate the average value. The specific results are detailed See Table 2 below:

Table 2: Data sheet of coating ease-of-cleaning experiment

test group Example 1 Example 2 Example 3 washed away time 26.5min 31.2min 32.3min test group Example 4 Example 5 Example 6 washed away time 30.1min 29.5min 30.5min

It can be seen from the data in the above table 1-2 that the starch-based paint of the present invention has good continuous adhesion and is easy to clean, and the main component is starch, which is easily degraded, non-toxic, and has a small environmental load.

The above-mentioned embodiment is only a preferred embodiment of the present invention, and cannot be used to limit the protection scope of the present invention. Any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of the present invention. Scope of protection claimed.

Claims (10)

1. A starch-based coating, characterized in that its preparation raw materials include the following components in parts by weight: 10-50 parts of starch, 30-75 parts of water, 0.1-5 parts of white pigment, 0.1-3 parts of film-forming aid 0.01-2 parts of antifungal agent and 0.1-10 parts of plasticizer. 2. The starch-based paint according to claim 1, wherein the white pigment is one or a combination of two or more of titanium dioxide, nano-calcium carbonate, lithopone, and zinc oxide. 3. The starch-based coating according to claim 1, characterized in that: the film-forming aid is polyethylene glycol, polyvinyl alcohol, polyvinylpyrrolidone and polyacrylamide, modified cellulose, alcohol ethers. At least one of film-forming aids and alcohol ester film-forming aids. 4. The starch-based coating according to claim 3, characterized in that: the weight average molecular weight of the polyethylene glycol is 200-8000. 5. The starch-based coating according to claim 1, characterized in that: the antifungal agent is 1,2-phenylpropylisothiazolin-3-ketone, benzoimidazole methyl carbamate, 2,4,5 , A combination of one or more of 6-tetrachloroisophthalonitrile, 2-n-octyl-4-isothiazolin-3-one and 2-(4-thiazolyl)benzimidazole. 6. The starch-based coating according to claim 1, characterized in that: the starch is a water-soluble modified starch. 7. The starch-based paint according to claim 1, characterized in that: the plasticizer is at least one of glycerin, sorbitol, surfactant and citric acid. 8. The starch-based coating according to claim 1, characterized in that its preparation raw materials include the following components in parts by weight: 18 parts of water-soluble modified starch, 75 parts of water, 2 parts of zinc oxide, 1 part of polyvinylpyrrolidone 0.5 parts of 2-n-octyl-4-isothiazolin-3-one, 0.5 parts of 2-(4-thiazolyl) benzimidazole and 3 parts of sorbitol. 9. The preparation method of the starch-based paint according to claim 1, characterized in that it comprises the steps of: weighing each component according to the recipe amount, then mixing, and uniformly dispersing in an emulsifying device to obtain final product. 10. the preparation method of starch-based coating according to claim 9 is characterized in that carrying out surface treatment to white pigment in advance, and surface treatment specifically comprises the following steps: get porous starch, be dissolved in water, obtain starch aqueous solution, described white pigment , The weight ratio of porous starch and water is (1-10):(1-10):(80-98); then add the white pigment in the starch aqueous solution while stirring, the stirring speed is 50-1200r/min, continue to stir 30min, then ultrasonically disperse for 2h, and stand overnight; then centrifuge and dry at a centrifugal speed of 1200-2000r/min and a centrifugation time of 3-8min to obtain a white pigment after surface treatment.